Usenet 1994 October/usenetsourcesnewsgroupsinfomagicoctober1994disk2.iso/misc/volume16/ecuman3/part01

Internet Message Format | 1991-01-05 | 55.2 KB

From: wht@n4hgf (Warren Tucker)
Newsgroups: comp.sources.misc
Subject: v16i022:  ECU async comm package rev 3.0 manual, Part01/03
Message-ID: <[e-mail]>
Date: 5 Jan 91 06:22:11 GMT
Approved: [e-mail]
X-Checksum-Snefru: cd8c975d 81aa3d38 372b91df 3e20f47c

Submitted-by: Warren Tucker <wht@n4hgf>
Posting-number: Volume 16, Issue 22
Archive-name: ecuman3/part01

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#!/bin/sh
# This is ecuman3, a shell archive (shar 3.46)
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# ============= doc/ecu.man ==============
if test ! -d 'doc'; then
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sed 's/^X//' << 'SHAR_EOF' > 'doc/ecu.man' &&
X
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X                  - 1 -
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X                    ECU    3.00
X
X                (Extended Call Utility)
X
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X            Personal Communications    Package
X                   for XENIX System    V
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X        Warren H. Tucker, III <[e-mail]>
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X                 Technical Description
X                 Revision 3.00
X                    12/26/90
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X    Public Domain by wht@n4hgf                12/26/90
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X    ECU    Technical Description                       1
X
X
X
X    1.    Introduction
X
X
X    ECU    (Extended Call Utility)    is a personal communications program for
X    users of SCO UNIX V.3.2/386    and XENIX V on 80286 and 80386 systems.
X    This preliminary document describes    ECU functionality and implementation
X    from a technical point of view.
X
X    ECU    provides the classic terminal communications facility of passing
X    keyboard data to a serial line and incoming    data to    the computer video
X    display.  In addition, a dialing directory,    a function key mapping
X    feature, and session logging are available.
X
X    A very flexible procedure (script) language    is also    incorporated to
X    automate many communications tasks.     Using shell scripts and ECU
X    procedures,    it is possible to use ECU in an    entirely "unattended"
X    fashion for    batch-style communications sessions.
X
X    ECU    presents to the    host a flexible    "ANSI" terminal    type, accepting    any
X    valid video    control    sequences from MS-DOS or SCO documentation as of
X    late 1990.    It also    fares well, though imperfectly,    with Sun and VT-100
X    in-band video control sequences.  Standards    are great: everybody should
X    have one, especially if they call it "ANSI." For more information, refer
X    to the section below titled    "ANSI Filter."
X
X    The    program    supports almost    any local terminal (console) which can be
X    described in a termcap database entry.  For    more information, refer    to
X    "Supported Terminals."
X
X    ECU    supports numerous file transfer    protocols: as of this writing,
X    XMODEM, XMODEM/CRC,    XMODEM-1K, YMODEM/CRC Batch, ZMODEM/CRC-16,
X    ZMODEM/CRC-32, Kermit and SEAlink are supported.  For more information,
X    refer to the sections describing the individual interactive    and
X    procedure file transfer commands.
X
X    This document is better than that supplied with ECU    2.0, but is still
X    rough in many places.  It attempts to get across to    the inquiring mind
X    how    ECU works.  In places, an understanding    of the UNIX programming
X    model, UNIX, XENIX and UUCP    constructs and asynchronous communications
X    techniques is assumed.  In other places, the document goes into tedious
X    detail about the simplest of concepts.  A great deal of attention has
X    been placed    in accurate and    robust coding of the program.  Perhaps,    time
X    permitting,    one day    I can say the same for this document.
X
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X    Public Domain by wht@n4hgf                12/26/90
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X    ECU    Technical Description                       2
X
X
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X    2.    Basic Organization
X
X
X    ECU    forks to run as    two separate processes,    a transmitter (XMTR) and a
X    receiver (RCVR).  The two processes    communicate via    signals    and a System
X    V shared memory segment.  XMTR controls RCVR and terminates    it under
X    certain circumstances, called here auxiliary operations.  After an
X    auxiliary operation    completes, XMTR    forks again to recreate    RCVR.
X
X
X    2.1     Transmitter Process (XMTR)
X
X
X    XMTR accepts user input from the computer keyboard;    input is recognized
X    as belonging to one    of two types: 1) transmit data and 2) ECU commands.
X    Keyboard input is passed to    the serial line    driver until an    ECU command
X    is detected.  Commands are prefixed    with a HOME key    which causes ECU to
X    accept keyboard data up to the next    ENTER key as command text.  After a
X    command has    been processed,    keyed data is again routed to the serial
X    line.
X
X
X    2.1.1  Keyboard Interface
X
X    The    keyboard driver    is set into the    raw mode.  XMTR    reads characters one
X    at a time from the driver.    Normally, characters read from the keyboard
X    are    passed directly    to the serial line driver.  The    ASCII ESC ("escape")
X    character is handled as a special case.  When a function key is pressed,
X    the    keyboard generates to XMTR an ESC character, followed by more
X    characters describing which    function key has been pressed.    Pressing the
X    ESC    key also causes    XMTR to    see an ESC character, but with no subsequent
X    function key "suffix".
X
X    When an ESC    character is read, XMTR    delays transmission of the character
X    to the line    for a short period to determine    whether    the ESC    key has    been
X    pressed or a function key has been pressed.     If no "suffix"    is detected,
X    the    ESC is passed to the line, having suffered an insignificant delay
X    given human    typing speeds.
X
X    If a function key "suffix" is detected, the    function key type is
X    decoded.  The HOME key indicates an    ECU command follows.  Any other
X    function key is passed to the function key mapping feature (described
X    later).
X
X
X    2.1.2  ECU Command Assembly
X
X    After HOME has been    pressed, XMTR presents a reverse video prompt on the
X    display, indicating    its readiness to accept    a command.  During input,
X    the    command    may be edited using the    same control keys specified with
X    stty(C).  Additonal    editing    using the left and right arrow keys and    the
X
X
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X    Public Domain by wht@n4hgf                12/26/90
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X    ECU    Technical Description                       3
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X    Ins(ert) key are usually available.     Command input may be aborted by
X    pressing ESC.  When    a command string has been assembled, it    is passed to
X    the    command    processor, which breaks    the command arguments into a token
X    array similar to the argc/argv array.  When    the command handler returns,
X    XMTR returns to its    normal mode of copying keyboard    data to    the serial
X    line.
X
X    Further information    on XMTR    command    line processing    may be found in
X    later sections titled Line Editing and Interactive Command History.
X
X
X    2.1.3  Function Key    Mapping
X
X    While in tty-to-line mode, function    keys other than    HOME are available
X    to be mapped to transmit short keystroke sequences on a connection by
X    connection basis.  Under control of    the dialing command ("Dial"
X    described below)  or the function key control command ("FK"), predefined
X    function key maps may be loaded.
X
X    Function keys which    may be mapped are F1 through F12, PgUp,    PgDn, End,
X    Ins, Del, and the cursor control keys.
X
X    The    unshifted keypad '5' key is permanently    mapped to produce a screen
X    snapshot when it is    pressed    and XMTR is reading from the keyboard.
X
X    Thhe BackTab (shift    Tab) key is mpermanently mapped    to a screen
X    redisplay feature.
X
X
X    2.1.4  Auxiliary Operation Control
X
X    Certain commands cause ECU to perform what is called an auxiliary
X    operation, requiring temporary termination of the RCVR process.  Such
X    operations are not as useful with cu(C), because cu    does NOT kill its
X    receiver process at    any time.  As a    result,    it impossible to run a
X    modern file    transfer protocol since    the cu receiver    process    eats some of
X    the    characters sent    by the remote protocol program.
X
X    There are two types    of auxiliary operations: 1) internal interactive
X    command or procedure execution and 2) external program execution.
X    Certain internal commands require tight control over the serial line.
X    For    instance, the dial command requires transmitting modem command
X    strings and    receiving modem    response codes.     Such functions    are best
X    accomplished by single-process control of the line.     External program
X    execution is of two    kinds, file transfer invocation    and local
X    shell/command execution.
X
X    The    RCVR process is    terminated in any of these cases either    to avoid the
X    RCVR swallowing characters intended    for other targets (the modem handler
X    in XMTR or the file    transfer protocol) or to avoid having remote data
X    interspersed with the output of local programs.
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X    Public Domain by wht@n4hgf                12/26/90
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X    ECU    Technical Description                       4
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X    2.2     Receiver Process (RCVR)
X
X
X    The    receiver process reads the incoming serial data    stream and passes it
X    to the user    terminal driver    through    a filter which scans for events    such
X    as the occurrence of ASCII BEL (bell) characters or    terminal control
X    sequences.    RCVR also handles the session logging and ANSI filter
X    functions.
X
X
X    2.2.1  ANSI    Filter
X
X    Since the term "ANSI" is used to describe many variations on the ANSI
X    X3.64 recommendations for terminal control (read "IBM pseudo-ANSI"), the
X    ECU    receiver process has an    "ANSI filter" which attempts to    translate
X    incompatible (read "MSDOS")    ANSI-like control sequences to sequences
X    acceptable to the UNIX/XENIX display driver.  This includes    support    for
X    the    MS-DOS "save cursor" and "restore cursor" sequences.  More
X    information    may be found later in "Terminal    Model."
X
X
X    2.2.2  Session Logging
X
X    When directed by the user, the RCVR    process    logs incoming serial data to
X    a file named on the    log command line.  The default operation is to
X    filter unprintable characters (other than TAB and NL) from the log,    but
X    raw    logging    is available with a command option.  In    a like manner, the
X    default is for appending to    an existing file, but a    command    option may
X    specify scratching any previous contents.
X
X    Log    files receive header lines each    time the file is opened, stating the
X    logical system name, the telephone number and the date/time.
X
X
X
X    2.3     Supported Terminals
X
X
X    ECU    does not attempt to support terminal emulation in the classic sense
X    of the word.  It presents to the remote host an "ANSI-like"    terminal
X    type as described earlier in the introduction and in the section titled
X    "ANSI Filter." However, it does support, with limitations, any LOCAL
X    terminal (console) for which a valid termcap description exists. You MAY
X    be able to use ECU with a remote terminal (calling into UNIX/XENIX over
X    a network or modem), but you may get unfavorable results with function
X    key    usage if your modem is a "packetizing" type, such as a Telebit or if
X    ethernet or    other networking chops up your keystroke sequences.  ECU
X    allows approximately 60 milliseconds after receiving an ASCII ESC
X    character for later    characters of a    function key sequence to arrive.  If
X    at least one character of the sequence has not been    received in that
X    time, ECU treats the key as    an ESCape, not a function key.    This typical
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X    Public Domain by wht@n4hgf                12/26/90
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X    ECU    Technical Description                       5
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X
X    problem of detecting ESC vs. function key is unfortunate, but we must
X    live with it until paradigms change    (say, in about 2010?).
X
X    The    termcap    entry for a console MUST contain a valid entry for the
X    following database entries:
X
X
X    cl        clear screen
X    kl        cursor left
X    kr        cursor right
X    dc        delete character
X    dl        delete line
X    cd        clear to end of display
X    ce        clear to end of line
X    ic        insert character
X    al        insert line    ("add" a "line")
X    cm        cursor motion
X    so        stand out (terminal    specific attention getter)
X    se        stand end
X
X
X    The    above sequences    MUST be    present, valid and reasonably efficient.
X    ECU    does not use curses during most    of it's    operation, and unlike
X    curses, makes no attempt to    emulate    missing    terminal functionality.
X    Failure to provide valid entries will result in strange behavior with no
X    warning.
X
X    Note that the formal termcap description of    "kl" and "kr" state these
X    are    sequences generated by the terminal keyboard, but ECU expects that
X    these sequences also causes    the desired effect when    sent to    the screen.
X
X    Additionally, the following, optional, sequences will be used if they
X    are    detected.
X
X
X    mb        bold on ("XENIX" extension)
X    me        bold off ("XENIX" extension)
X    us        underscrore    on
X    ue        underscrore    off
X    vb        visual bell
X
X
X    A future version of    ECU may    use terminfo instead of    termcap.  Problems
X    with terminfo prevent its use at the present time.    In addition, early
X    versions of    XENIX do not support terminfo.
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X    Public Domain by wht@n4hgf                12/26/90
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X    ECU    Technical Description                       6
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X    2.4     Function Key Recognition
X
X
X    ECU    recognizes 23 function keys as having special significance to its
X    operation.    They are (with their AT/"ANSI" character sequences):
X
X     Internal  Description      AT/"ANSI" Char-
X     Name       or Key Label      acter    Sequence
X     --------  ------------      ---------------
X     F1       F1             ESC [ M
X     F2       F2             ESC [ N
X     F3       F3             ESC [ O
X     F4       F4             ESC [ P
X     F5       F5             ESC [ Q
X     F6       F6             ESC [ R
X     F7       F7             ESC [ S
X     F8       F8             ESC [ T
X     F9       F9             ESC [ U
X     F10       F10             ESC [ V
X     F11       F11             ESC [ W
X     F12       F12             ESC [ X
X     Home       Home             ESC [ H
X     End       End             ESC [ F
X     PgUp       Page    up         ESC [ I
X     PgDn       Page    down         ESC [ G
X     CUU       Up arrow         ESC [ A
X     CUD       Down    arrow         ESC [ B
X     CUL       Left    arrow         ESC [ D
X     CUR       Right arrow         ESC [ C
X     CU5       "Cursor 5"         ESC [ E
X     Ins       Insert         ESC [ L
X     BkTab       Back    Tab         ESC [ Z
X
X
X    ECU    recognizes function keys entered by the    user in    one of two ways,
X    depending upon whether the terminal    is recognized as an "ANSI" or "non-
X    ANSI" terminal (see    "Supported Terminals" above).
X
X    If an AT/"ANSI" terminal is    in use,    ECU expects the    standard AT/"ANSI"
X    sequences to be generated by the keyboard according    to the above table.
X    This means that no use of the setkey(C) program (or    similar
X    functionality) may be active.
X
X    If an "non-ANSI" terminal is in use, ECU matches a function    key sequence
X    to an internal function key    representation by testing all keystroke
X    sequences again an internal    table loaded at    the beginning of execution
X    from the file ~/.ecu/nonansikeys.  NOTE that supported terminals MUST
X    employ function keys which generate    sequences beginning with an ASCII
X    ESC    (escape, 0x1B, decimal 27, octal 33).
X
X    The    format of an file entry    is shown below in the 'ansilike' example
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X    Public Domain by wht@n4hgf                12/26/90
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X    ECU    Technical Description                       7
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X    (used to test ECU from the console by defining an 'ansi' terminal type
X    nevertheless equivalent to 'ansi').
X
X    Lines beginning with '#' are comments.
X
X
X     #+------------------------------
X     # ECU 3.0 nonansikeys
X     #-------------------------------
X     ansilike
X     ansi
X     msdos
X     dos
X     dosansi
X     test
X         F1:F1:         esc [ M
X         F2:F2:         esc [ N
X         F3:F3:         esc [ O
X         F4:F4:         esc [ P
X         F5:F5:         esc [ Q
X         F6:F6:         esc [ R
X         F7:F7:         esc [ S
X         F8:F8:         esc [ T
X         F9:F9:         esc [ U
X         F10:F10:         esc [ V
X         F11:F11:         esc [ W
X         F12:F12:         esc [ X
X         Home:Home:         esc [ H
X         End:End:         esc [ F
X         PgUp:PgUp:         esc [ I
X         PgDn:PgDn:         esc [ G
X         CUU:CUU:         esc [ A
X         CUL:CUL:         esc [ D
X         CU5:CU5:         esc [ E
X         CUR:CUR:         esc [ C
X         CUD:CUD:         esc [ B
X         Ins:Ins:         esc [ L
X         BkTab:BackTab:  esc [ Z
X
X
X    The    first line(s) in a terminal keyboard description begin in column 1
X    and    contain    the terminal types (a la $TERM)    for which the keyboard
X    description    are valid.  The    example    entry contains several references to
X    terminal types containing the substring description    servicing multiple
X    terminal types.
X
X    ECU    determines whether a terminal meets the    ansi vs.  ANSI distinction
X    by searching for 'ansi' in the $TERM environment variable (without
X    regard to case: 'AnSi' will    match as well as though    your $TERM
X    environment    variable does not contain 'ansi' (such as 'sun'), then you
X    may    add the    terminal type to the 'ansilike'    entry rather than create a
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X    Public Domain by wht@n4hgf                12/26/90
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X    ECU    Technical Description                       8
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X    separate entry.
X
X    Following the "first lines"    are key    definition entries, each preceded by
X    at least one tab or    space.    Each entry is composed of three    fields
X    delimited by commas.  The first field of an    entry is the internal ECU
X    function key name and must be chosen from the following strings (with no
X    regard to case): "F1", "F2", "F3", "F4", "F5", "F6", "F7", "F8", "F9",
X    "F10", "F11", "F12", "Home", "End",    "PgUp",    "PgDn",    "CUU" (cursor up),
X    "CUL" (cursor left), "CU5" (unshifted cursor pad 5), "CUR" (cursor
X    right) and "CUD" (cursor down). The    second field contains the name of
X    the    key as it appears on the non-ANSI keyboard (such as "F16" for End on
X    the    Wyse 60).  The third field is a    description of the character
X    sequence generated by the non-ANSI keyboard    when the chosen    key is
X    pressed; it    is a string of one or more tokens separated by spaces or
X    tabs.
X
X    Note that while ECU    requires a function key    sequence to begin with an
X    ASCII ESC (escape),    each table entry must contain an 'esc' as it's first
X    sequence token.  This seemingly superfluous    requirement ensures
X    compatibility with possible    future support for function keys which do
X    not    begin with ESC.
X
X    In addition, function key sequences    may not    contain    the NUL    (0)
X    character, nor may they exceed 10 characters, including the    leading    ESC.
X
X    The    tokens are described in    full in    the following  sections    titled
X    "Function Key Recognition" and "Function Key Mapping."
X
X    PLEASE NOTE: ECU does not have a reasonable    way for    you to terminate it
X    if there are no Home and End keys defined, so it refuses to    proceed    if
X    no definitions are found.  Even so,    if you have incorrect definitions,
X    you    may not    be able    to get out of ECU without a kill -1 <pid> from
X    another terminal or    hanging    up your    connection with    UNIX/XENIX if using
X    ECU    from remote.
X
X
X    2.5     Function Key Mapping
X
X
X    ECU    recognizes function keys in a manner described in the above section
X    titled "Function Key Recognition." This section deals with how ECU
X    behaves once a function key    has been recognized as having been entered
X    at the keyboard.
X
X    All    function keys with the exception of the    Home, BkTab (shift TAB), and
X    keypad unshifted 5 key can be programmed to    emit selected strings.    For
X    instance, when communicating with a    Stratus    computer, doing    your best to
X    emulate a VT100, a function    key map    might be constructed as    follows:
X
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X    Public Domain by wht@n4hgf                12/26/90
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X    ECU    Technical Description                       9
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X     F1     F1    F2  F2           Home ecu    cmd    PgUp  dispform
X     F3     F3    F4  F4           End  enter    PgDn  cancel
X     F5     F5    F6  F6           Ins  local shell    CUR5  Screen dump
X     F7     status    F8  no status  BkTab restore receiver display
X     F9        F10 redisp     CUR^ ^        CUR>  >
X     F11    F12           CUR< <        CURv  v
X
X
X    Function key mapping is placed in ~/.ecu/keys.  The    Stratus    example:
X
X    stratus
X    F1:F1:esc O q
X    F2:F2:esc O r
X    F3:F3:esc O s
X    F4:F4:esc O t
X    F5:F5:esc O u
X    F6:F6:esc O v
X    F7:F7:esc O w
X    F8:status:dc4
X    F9:no status:nl
X    F10:redisp:esc O y
X    F11:redisp:syn
X    PGDN:cancel:esc    O Q
X    END:enter:esc O    M
X    PGUP:dispform:esc O R
X    CUU:^:dle
X    CUD:v:so
X    CUL:<:stx
X    CUR:>:ack
X
X
X    If you have    installed the mapkey file (as described    in the release
X    directory in mapkeys/README), then ALT-a through ALT-z causes the
X    "silent" execution of procedures 'alt_a.ep'    for ALT-a, 'alt_b.ep' for
X    ALT-b, etc.     The models subdirectory contains an example alt_h.ep which
X    will home the cursor when ALT-h is pressed.     This facility allows the
X    execution of 26 procedures without ECU itself changing the video display
X    at all.  Any changes to the    display    (short of procedure errors) will
X    result solely from the action of the invoked procedure.  If    the
X    procedure matching the ALT-[a-z] key pressed cannot    be found, a short
X    error message is printed and the terminal bell is rung.  (Using back tab
X    may    be used    to refresh the display in this event.)
X
X    The    strings    used to    represent "non-printable" characters are identical
X    to the formal ASCII    names given them (without regard to case), viz:
X
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X    Public Domain by wht@n4hgf                12/26/90
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X    ECU    Technical Description                      10
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X     0x00 nul      NUL may not appear in a non-ANSI
X     0x01 soh      function    key definition
X     0x02 stx
X     0x03 etx
X     0x04 eot
X     0x05 enq
X     0x06 ack
X     0x07 bel
X     0x08 bs
X     0x09 ht
X     0x0A nl
X     0x0B vt
X     0x0C np
X     0x0D cr
X     0x0E so
X     0x0F si
X     0x10 dle
X     0x11 dc1
X     0x12 dc2
X     0x13 dc3
X     0x14 dc4
X     0x15 nak
X     0x16 syn
X     0x17 etb
X     0x18 can
X     0x19 em
X     0x1A sub
X     0x1B esc
X     0x1C fs
X     0x1D gs
X     0x1E rs
X     0x1F us
X     0x20 sp
X     0x7F del
X
X
X
X    2.6     Host Video Control Sequences
X
X
X
X    2.6.1  All Local Terminals
X
X    The    following sequences are    recieved over the line by ECU and properly
X    interpreted    for all    local terminal types (multiscreen, rlogin/xterm
X    pseudotty, serial).
X
X
X
X
X
X
X
X
X    Public Domain by wht@n4hgf                12/26/90
X
X
X
X
X
X
X
X    ECU    Technical Description                      11
X
X
X
X    Sequence  |    Description
X    ----------+-------------------------------
X    ESC    [ @   |    ICH
X    ESC    [ A   |    CUU
X    ESC    [ B   |    CUD
X    ESC    [ C   |    CUF
X    ESC    [ D   |    CUB
X    ESC    [ E   |    CNL      See ANSI X3.64,
X    ESC    [ F   |    CPL      screen(HW) and/or
X    ESC    [ H   |    CUP      MS-DOS Technical
X    ESC    [ J   |    ED      Reference Manual
X    ESC    [ K   |    EL
X    ESC    [ L   |    IL
X    ESC    [ M   |    DL
X    ESC    [ P   |    DCH
X    ESC    [ S   |    SU
X    ESC    [ T   |    SD
X    ESC    [ X   |    ECH
X    ESC    [ `   |    HPA
X    ESC    [ a   |    HPR
X    ESC    [ d   |    VPA
X    ESC    [ e   |    VPR
X    ESC    [ f   |    HVP
X    ESC    [ ? m |    SGR
X    ESC    [ n   |    DSR (see below)
X    ESC    [ s   |    save cursor MS-DOSism
X    ESC    [ u   |    restore    cursor MS-DOSism
X
X    SGR    Sequences for ALL TERMINALS
X    Sequence  |    Description   |     Maps to termcap
X    ----------+---------------+-------------------------------
X    ESC    [ 0 m |    normal          |     "se"+"me"+"ue"
X    ESC    [ 1 m |    bold          |     "so"
X    ESC    [ 4 m |    underscore    |     "us"
X    ESC    [ 5 m |    blink          |     "mb" (XENIX extension)
X    ESC    [ 7 m |    reverse    video |     "so"
X
X
X
X    2.6.2  Multiscreen Local Terminals
X
X    In addition    to the above, if you are operating from    a color    multiscreen,
X    additional (SCO and    MS-DOS/ANSI.SYS) sequences are supported (see
X    screen(HW)):
X
X
X
X
X
X
X
X
X
X
X    Public Domain by wht@n4hgf                12/26/90
X
X
X
X
X
X
X
X    ECU    Technical Description                      12
X
X
X
X    Additional Multiscreen SGR Sequences
X    Sequence    | Description  (no termcap mapping)
X    ------------+-----------------------------------------------
X    ESC    [ 8 m    | non-display
X    ESC    [ 1 0 m    | select primary font
X    ESC    [ 1 1 m    | select first alternate font (0x00-0x1F)
X    ESC    [ 1 2 m    | select second    alternate font (0x80-0xFF)
X    ESC    [ 3 0 m    | black    foreground
X    ESC    [ 3 1 m    | red foreground
X    ESC    [ 3 2 m    | green    foreground
X    ESC    [ 3 3 m    | brown    foreground
X    ESC    [ 3 4 m    | blue foreground
X    ESC    [ 3 5 m    | magenta foreground
X    ESC    [ 3 6 m    | cyan foreground
X    ESC    [ 3 7 m    | white    foreground
X    ESC    [ 3 8 m    | enables underline option
X    ESC    [ 3 9 m    | disables underline option
X    ESC    [ 4 0 m    | black    background
X    ESC    [ 4 1 m    | red background
X    ESC    [ 4 2 m    | green    background
X    ESC    [ 4 3 m    | brown    background
X    ESC    [ 4 4 m    | blue background
X    ESC    [ 4 5 m    | magenta background
X    ESC    [ 4 6 m    | cyan background
X    ESC    [ 4 7 m    | white    background
X
X
X
X    ECU    also does it's best to interpret MS-DOS    "SGR gaggles" such as
X
X     ESC [ 5 ; 3 4 ; 4 7 m
X
X    which means    "set the terminal to white background with blue    blinking
X    foreground."
X
X
X    2.6.3  Character Mapping
X
X    The    MS-DOS ROM signal ruling characters from the following table are
X    mapped after the fashion of:
X
X
X       .-----+--------.
X       |     |      |
X       |     +--------+
X       |     |      |
X       +-----+      |
X       |     |      |
X       `-----+--------'
X
X
X
X
X
X    Public Domain by wht@n4hgf                12/26/90
X
X
X
X
X
X
X
X    ECU    Technical Description                      13
X
X
X
X    Mapped Characters (see pc_scr.h):
X    Hex     | Description
X    -----+---------------------------
X    0xDA | top left single rule
X    0xBF | top right single rule
X    0xC0 | bottom left single rule
X    0xD9 | bottom right    single rule
X    0xC3 | left    hand T
X    0xB4 | right hand T
X    0xB3 | vertical rule
X    0xC4 | horizontal rule
X
X
X    (Due to momentary laziness on the part of the author, double ruling
X    characters will appear as random druk, unless your terminal    is smart
X    enough to have joined the Church of    the True-Blue ROM.  One    day an X
X    version of this program will appear    and you    can choose to no longer
X    accomplish real work, but may spend    your days editing 42Kb resource
X    files which    will give you TAC, Total Anal Control, over all    this.)
X
X
X    2.7     Line Editing
X
X
X    When you are entering a line of text for an    ecu command or in a field on
X    a screen, you may edit it in a number of ways at any time prior to
X    pressing Enter.  Cursor Left moves the cursofr left    by one character
X    position, nondestructively.     Cursor    Right moves to the right.  Insert
X    toggles insert mode.  Backspace (your erase    key as specified to stty in
X    commands, the actual backspace key in screens) deletes the character to
X    the    left of    the cursor.  Your line kill key    (as specified to stty) in
X    command mode or the    ^U character in    screen mode erases the entire line.
X    Esc    in command mode    cancels    the command.  Esc in screen mode usually
X    cancels the    screen or subfunction in a screen.  ^L or ^R in    interactive
X    command mode shows the current state of Insert mode    and redisplays the
X    edited string.
X
X
X    2.8     Screen    Dump
X
X
X    When the "cursor 5"    key is pressed,    the screen contents are    dumped to a
X    file.  By default, this file is named '~/.ecu/screen.dump'.     The sdname
X    interactive    command    either displays    or changes the current screen dump
X    file name, depending upon whether or not a argument    is supplied.  The
X    scrdump procedure command can initiate a dump.
X
X
X    2.8.1  Multiscreen and Non-Multiscreen
X    Note that from multiscreens, screen    dump produces a    dump of    the actual
X    screen contents, including ECU-generated output.  When using a non-
X
X
X
X    Public Domain by wht@n4hgf                12/26/90
X
X
X
X
X
X
X
X    ECU    Technical Description                      14
X
X
X
X    multiscreen    terminal, screen dump dumps only the shared memory virtual
X    screen as received from the    host.  If standard input is not    a serial
X    line (xterm    o or /dev/null), screen    dumps will be of the non-multiscreen
X    type.
X
X    If,    at a multiscreen, you wish a screen dump free of ECU output
X    "pollution," use Shift-Tab (BkTab) to redraw the screen, then perform
X    the    screen dump.
X
X
X    2.8.2  Multiscreen Bug
X    There has been a bug in the    multiscreen driver for some time wherein a
X    MEDIA COPY (screen dump) sequence ("ESC [ 2    i") leaves the "ESC [ 2"
X    part "active".  When a screen dump (Cursor 5) command is given, I do the
X    sacreen dump, then send a "l" to the screen    to work    around the bug ("ESC
X    2 [    l" unlocks the keyboard, essentially a no-op).    If and when it gets
X    fixed, you'll see an "l" show up on    your screen after a screen dump
X    sequence.  To fix this, comment out    the
X
X     #define MULTISCREEN_DUMP_BUG
X
X    at the top of ecuscrdump.c.
X
X
X    2.9     Interactive Command History
X
X
X    After pressing the Home key, pressing it again invokes the interactive
X    command history function.  After the second    Home key is pressed, the
X    last interactive command is    redisplayed. Line editing may be performed
X    on the command as described    in the previous    section.
X
X    Additionally, using    the Cursor Up key accesses less    recent commands.
X    The    Cursor Down key    accesses more recent commands.    Pressing Enter
X    causes the command to be executed.    Pressing Esc aborts command entry.
X
X
X    2.10  Dialing Directory
X
X
X    ECU    provides an on-line editable dialing directory.     Remote    systems    are
X    defined as records using alphanumeric identifiers as keys.    Other record
X    fields include telephone number, baud rate,    parity and textual
X    description.
X
X    Other features include changing to alternate dialing directory and a
X    multi-number redial    cycle function.    Refer below to the description of
X    the    interactive dial command.
X
X
X
X
X
X
X    Public Domain by wht@n4hgf                12/26/90
X
X
X
X
X
X
X
X    ECU    Technical Description                      15
X
X
X
X    2.11  Online Command Dictionary
X
X
X    The    ECU help command presents a display of interactive commands.  The
X    user is then prompted to enter a command name for further, Unix-style
X    "usage" information.
X
X
X    2.12  Multiscreen Event Alarm
X
X
X    By using the BN (bell notify) interactive command, an audible alert    is
X    sent to all    multiscreens when an ASCII BEL (bell) is received or when a
X    file transfer completes.  An additional option causes an alert when    ANY
X    data is received from the line.  This makes    it simple to do    work on
X    other multiscreen consoles and be alerted when attention to    the
X    communications session is required.
X
X    For    instance, the Berkeley 4.x Unix    utility    "talk" rings the bell when
X    another user wishes    an interactive chat mode.  BSD "biff" rings the    bell
X    when incoming mail is received.  Scripts or    commands at remote sites can
X    be configured to ring the bell as in:
X
X     make foo bar; bell; make more_stuff; bell;
X
X    to call attention to the ECU user when work    is being done on other
X    multiscreen    consoles.
X
X    This feature is only available when    you are    running    ECU from a
X    multiscreen.
X
X
X    2.13  Built-in Modem Dialer
X
X
X    The    built-in ECU dialer supports modems which use the Hayes-style AT
X    command set    or most    variants thereof.  It is used when HoneyDanBer UUCP
X    is not installed or    when there is no entry in the /usr/lib/uucp/Devices
X    file for the selected outgoing line.  (For more information, see the
X    later section titled "HoneyDanBer UUCP Interface".)
X
X    The    built-in dialer    uses files in the /usr/lib/ecu directory which
X    contains modem initialization information.    Modem initialization
X    filenames are made from concatenating the tty name with ".mi".  For
X    instance, tty1a's initialization file is named "tty1a.mi".
X
X    Commands for initializing the modem    and for    dialing    may be specified in
X    a very flexible manner.  Separate init and dial strings for    each legal
X    baud rate, a single    pair of    strings    for all    baud rates or a    combination
X    may    be specified.
X
X
X
X
X    Public Domain by wht@n4hgf                12/26/90
X
X
X
X
X
X
X
X    ECU    Technical Description                      16
X
X
X
X         Sample    Modem Initialization Files
X
X    #+-----------------------------------------------------------
X    #  tty1a.mi    - Microcom AX/9624c
X    #------------------------------------------------------------
X    init_>2400:ATS11=47X4S0=0S7=30Q1X1N3   # baud rates    > 2400
X    init_default:ATS11=47X4S0=0S7=30Q0X0N0 # other baud    rates
X    dial_default:ATDT
X
X
X    #+-----------------------------------------------------------
X    #  tty2d.mi    - USR Courier 2400
X    #------------------------------------------------------------
X    init_default:ATS11=47 X4 S0=0 S7=32
X    dial_default:ATDT
X
X
X    2.14  File Transfer
X
X
X    ECU    supports numerous file transfer    protocols: as of this writing,
X    XMODEM, XMODEM/CRC,    XMODEM-1K, YMODEM/CRC Batch, ZMODEM/CRC-16,
X    ZMODEM/CRC-32, and Kermit are supported.  Although a seamless interface
X    (there's some yuppie marketing newspeak) is    provided to the    user,
X    transfer is    facilitated by executing external programs.
X
X    As of this writing SEAlink is not in the best of health (no    one has
X    complained :-).
X
X    Kermit support required you    to obtain and patch C-Kermit 4E.  The patch
X    information    is available in    the ckermit subdirectory of the    release.  As
X    soon as C-Kermit 5 is stable and released by Columbia, a suitable patch
X    will be developed for it.  It is quite possible no patching    will be
X    necessary.
X
X    XMODEM, YMODEM and ZMODEM transfers    (thanks    to modified public domain
X    programs by    Chuck Forsberg)    present    dynamic    status displays    similar    to
X    the    following:
X
X
X
X
X
X
X
X
X
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X
X
X
X
X
X    Public Domain by wht@n4hgf                12/26/90
X
X
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X
X
X    ECU    Technical Description                      17
X
X
X
X    .-[ ecusz 2.37 ]-- /tmp    -----------------------------------.
X    |  ZMODEM/CRC32     Data xfer rate    ~=    896 chars/sec       |
X    |  File      1 of     1: ckermit-5a-130               |
X    |  File    position:     34053 length:    34053  -rw-r--r--   |
X    |  Sending 34053 bytes    total time ~=  0:40           |
X    |  tx: hdr ZFIN     0           rx: hdr ZFIN  0           |
X    |  Comm    I/O: rx         175  tx    34393 bytes           |
X    |  Baud    rate:  9600 BINARY blklen:  1024 comm mode: NORMAL |
X    |  Time:     started: 17:31:50  this file: 17:31:51       |
X    |  17:32:29     elapsed: 00:00:39           00:00:38       |
X    |  Errors: this    file:    0 total:    0 files skipped:   0   |
X    |  Total file bytes transferred: 34053               |
X    |  End of file                           |
X    |  Remote: CRC32 y  duplex y  continuous stream    y       |
X    `- Connected to    ki4xo -    procedure put_ck5a ----------------'
X
X
X
X    2.15  Procedures (Scripts)
X
X
X    A powerful,    language-style procedure language is incorporated into ECU.
X    The    language is described in later sections.
X
X
X    2.16  Initial (Startup) Procedure
X
X
X    An initial procedure may be    be specified to    ECU either to initialize an
X    interactive    session    or to execute an entirely unattended or    "batch"
X    communication session.
X
X
X
X    2.17  Home Directory Files
X
X
X    ECU    control    files reside in    the .ecu subdirectory of each user's home
X    directory.    For example, in    home directory /usr/wht:
X
X     /usr/wht/.ecu/dir          CD interactive command history file
X     /usr/wht/.ecu/keys          function key mapping
X     /usr/wht/.ecu/nonansikeys    function key mapping
X     /usr/wht/.ecu/log          connect, file transfer history
X     /usr/wht/.ecu/phone          default dialing directory
X     /usr/wht/.ecu/colors          colors used by ECU
X
X
X    The    .ecu directory is also searched    for ECU    procedure files    (having    the
X    '.ep' extension) in    the procedure cannot be    found in the current working
X    directory.
X
X
X
X    Public Domain by wht@n4hgf                12/26/90
X
X
X
X
X
X
X
X    ECU    Technical Description                      18
X
X
X
X    2.18  Lock Files
X
X
X    ECU    maintains lock files in    /usr/spool/uucp    in accordance with the
X    HoneyDanBer    UUCP conventions (ASCII    pids as    10-character strings
X    followed by    a newline).  Lock files    are created for    the lower-case
X    device names of a line and checked for in both cases. For example, both
X    LCK..tty1a is created when /dev/tty1a OR /dev/tty1A    is selected and
X    neither LCK..tty1a nor LCK..tty1A are active.  See the later section
X    titled "HoneyDanBer    UUCP Interface".
X
X
X    2.19  Dial-In/Dial-Out Line    Support
X
X
X    ECU    works with the SCO getty to support dialing out    on a line enabled
X    for    login.    After use of the line is complete, ECU signals the system to
X    restore incoming call status to the    line.  See the later section titled
X    "HoneyDanBer UUCP Interface".
X
X
X    2.20  Tools
X
X
X    Commands are provided for conversion of hexadecimal    or decimal numbers
X    to and from    ASCII equivalents.  For    example, 26(10)    == 0x1a    == ^Z ==
X    SUB.  For details, refer to    the description    of the XA and AX interactive
X    commands.
X
X
X    2.21  Shared Memory    'Friend' Interface
X
X
X    ECU    maintains a copy of the    received screen    image (80 x 43 maximum)    and
X    other information in its shared memory segment.  Normally, this
X    information    is used    only by    the transmitter    and receiver process.
X    However,  ECU supports the concept of a friend process which may access
X    the    shared memory segment, perform arbitrary auxiliary operations, read
X    from and write to the attached communications line and communicate
X    resulting information or status to an ECU procedure    via a 1024-byte
X    "friend" data area in the shared memory segment.
X
X    The    procedure language supports the    friend process concept through
X    commands and functions which allow
X
X       + passing the ECU shared    memory segment id (%shmid) to a    called
X     program,
X
X       + reading a single character or string of characters from screen
X     memory,
X
X
X
X
X    Public Domain by wht@n4hgf                12/26/90
X
X
X
X
X
X
X
X    ECU    Technical Description                      19
X
X
X
X       + reading cursor    position information and
X
X       + reading and writing of    characters, short or long integers and
X     strings in the    1024-byte "friend" shared memory data area.
X
X    The    algorithm for obtaining    the shared memory segment key is
X
X    0xEC000000L    + transmitter process id
X
X    Thus a "friend" process may    either use a %shmid shared memory key passed
X    as an argument or obtain the shared    memory key by using:
X
X    key_t shmkey = 0xEC000000L | getppid();
X
X
X    This facility allows batch and interactive applications to be developed
X    with C programs which would    be tedious or impractical to implement with
X    procedure language alone.
X
X    For    more information, refer    to the shared memory header file ecushm.h,
X    the    ecufriend subdirectory of the software release and to the
X    description    of the %shmid, %cury and %curx procedure functions and the
X    getf and putf procedure commands.
X
X
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X    Public Domain by wht@n4hgf                12/26/90
X
X
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X
X
X    ECU    Technical Description                      20
X
X
X
X    3.    Starting the Program
X
X
X
X    3.1     Simple    Startup    - Initial Setup    Menu
X
X
X    ECU    may be started in a number of ways through use of command line
X    switches, but the easiest is to enter
X
X     ecu
X
X    by itself.    In this    case, the screen is cleared and    the folowing screen
X    will be presented.
X
X
X
X
X      .--[ ecu 1.96 Copyright 1986,1989, W. Tucker ]-----------------.
X      |                                     |
X      |     Name/phone number to call: ___________________             |
X      |                                     |
X      |                                     |
X      |     tty: /dev/tty1a                         |
X      |                                     |
X      |     duplex: F  baud: 2400     parity:N  (data bits 8)         |
X      |     Add NL    to transmitted CR: N                     |
X      |     Add NL    to received CR:       N                     |
X      |                                     |
X      |                                     |
X      |      TAB:next ^B:prev END:proceed ^D:phone    dir  ESC:quit ecu    |
X      `- logical phone directory entry,    phone number or    empty -------'
X
X
X
X
X
X    3.1.1  Name/Phone Number Field
X
X    If a dialing directory has been configured,    a literal phone    number need
X    not    be entered.  However, on your first invocation,     you'll    very likely
X    have no directory.    Therefore, you have three options:
X
X
X
X
X
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X
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X
X
X    Public Domain by wht@n4hgf                12/26/90
X
X
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X
X
X    ECU    Technical Description                      21
X
X
X
X     1.  Enter a literal telephone number, (e.g. 18005551212).
X         Hyphens and open and close    parentheses may    also
X         be    entered.
X
X     2.  Press ENTER to skip the 'Name/phone' field    and enter
X         ^D    to enter the telephone directory to enter your
X         first directory entry.
X
X     3.  Press END to enter    interactive mode and use the Dial
X         interactive command to dial a literal telephone num-
X         ber or to enter the dialing directory.
X
X
X
X    3.1.2  Other Fields
X
X    The    'tty' field may    be used    to select an outgoing line other than the
X    default /dev/tty1a.     Note:    only the last two characters of    the tty    name
X    need be entered.  The remainder of the tty name is assumed to be
X    '/dev/tty'.
X
X    The    'duplex' field may be used to select a duplex value other than the
X    default 'F'    (full).
X
X    The    'baud' field may be used to select a baud rate value other than    the
X    default 2400.
X
X    The    'parity' field may be used to select a parity value other than the
X    default 'N'    (none).
X
X
X    The    'Add NL    to transmitted CR' and 'Add NL to received CR' fields are
X    usually left defaulted to 'N' (no).     If you    will be    communicating with a
X    terminal (with a human), you will usually need to set both of these
X    fields to 'Y' as well as to    select 'H'alf duplex.
X
X
X    3.1.3  Special Characters
X
X    Special keyboard characters    while filling in the startup screen are:
X
X
X
X
X
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X
X
X    Public Domain by wht@n4hgf                12/26/90
X
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X
X    ECU    Technical Description                      22
X
X
X
X      TAB     move to next field ...    if nothing typed in
X         the field, do not disturb contents
X
X      ^B     back up to previous field
X
X      END     proceed with session, dialing remote if
X         logical directory entry name or literal
X         telephone number enetered
X
X      ^D     enter phone directory
X
X      ESC     quit ecu without any communications
X
X
X
X    3.2     Command Line Arguments    and Switches
X
X
X    ECU    can be started in a number of ways:
X
X
X     ecu [-lxx] [-b<baud>] [-h] [-e|-o] [-t] <tel-number>
X     ecu [-lxx] [-b<baud>] [-h] [-e|-o] [-t]
X     ecu [-t] [-h] <logical>
X     ecu [-lxx] [-b<baud>] [-h] [-e|-o] [-d] [-D] -p <proc>    [<arg> ...]
X
X
X
X    3.2.1  Non-Switch Arguments
X
X    Only one type of non-switch    argument may be    used on    the command line.
X    <tel-number> or <logical> may appear when the -p switch is absent.    One
X    or more <arg> arguments may    appear when the    -p switch is used.
X
X
X    3.2.2  <tel-number>
X
X    This type of argument has a    digit as its initial character and
X    represents an actual telephone number to be    passed to a modem dialer
X    program or Dialers chat script.  The string    may contain non-numeric
X    characters if appropriate for a dialer program, such as dialTBIT.  For
X    example:
X
X    ecu -l/dev/tty2a -b 19200 -e 5551212UC
X
X    uses tty2a (assumed    to be connected    to a Trailblazer modem)    and
X    establishes    a 19200    baud, even parity PEP Compressed connection after
X    dialing 5551212.
X
X
X
X
X
X
X    Public Domain by wht@n4hgf                12/26/90
X
X
X
X
X
X
X
X    ECU    Technical Description                      23
X
X
X
X    3.2.3  <logical>
X
X    This type of argument has an alphabetic initial character and causes the
X    dialing directory entry by that name to be dialed.    The line may be
X    specified by '-l', but if the dialing directory specifies a    line (tty
X    field contaions other than 'Any'), the dialing directory entry will
X    override it.  The '-b', '-e' and '-o' switches are ignored;    the values
X    specified by the dialing directory entry are used.    The '-t' and '-h'
X    switches are valid and honored if present.
X
X
X    3.2.4  <arg>
X
X    This type of argument is passed to an initial procedure when the -p
X    switch is present.
X
X
X    ecu    -p unixlogin user pwd ansi43
X
X    executes unixlogin.ep with arguments 'user'    'pwd' 'ansi43'
X
X    For    more detail, refer to the description of -p, -d    and -D below.
X
X
X    3.2.5  -l
X
X    When ECU starts up,    it normally chooses a line as described    later in the
X    section titled "Choosing a Dialout Line".  Specifying the -l switch    can
X    suggest that the program choose a specific line.  The argument to the
X    switch is the last two charcters of    the ttyname; e.g., "-l1a".
X
X    On a system    with HoneyDanBerr UUCP,    to access a device which does not
X    appear in the Devices file,    it may be necessary to explicitly specify
X    the    device with -l.
X
X
X    3.2.6  -f
X    Normally, ECU starts up in the full    duplex mode.  If half duplex is
X    desired, the -f switch is used.
X
X
X    3.2.7  -e, -o
X
X    Normally, ECU starts up with 8 data    bits and no parity.  If    even parity
X    is desired,    the -e switch is specified.  If    odd parity is desired, the
X    -o switch is specified.
X
X    These switches
X
X
X
X
X
X
X    Public Domain by wht@n4hgf                12/26/90
X
X
X
X
X
X
X
X    ECU    Technical Description                      24
X
X
X
X    3.2.8  -p <procname>
X
X    The    -p switch causes ECU to    execute    the procedure <procname>
X    ("<procname>.ep") immediately.  Such a procedure is    termed the initial
X    procedure.    All non-switch arguments after <procname> are passed as
X    arguments to the initial procedure (see the    descriptions of    the integer
X    function %argc and the string function %argv).
X
X
X    3.2.9  -d
X
X    The    -d switch instructs ECU    to "die" (terminate with error status) if an
X    initial procedure (-p) fails.  This    switch ensures a batch ECU execution
X    will hang up any connection    and terminate if a procedure error occurs.
X    See    also -D    below.
X
X    Absence of the -d and -D switches causes ecu (upon any completion of the
X    initial procedure) to enter    the 1) interactive mode    if a line was
X    successfully attached by the procedure or 2) the setup menu    if no line
X    was    attached.
X
X
X    3.2.10  -D
X
X    The    -D switch instructs ECU    to unconditionally terminate when an initial
X    procedure finishes.
X
X
X    3.2.11  -t
X
X    The    -t switch instructs ECU    to map incoming    and outgoing carriage
X    returns to carriage    return/line feed pairs.     This is helpful if the
X    remote connection will be to a terminal with a human operator.  Use    of
X    the    -h switch is probably also necessary.
X
X
X    3.2.12  -A
X
X    Normally, ECU reads    the terminal type (TERM    environment variable) to
X    determine whether or not a terminal    is "ANSI"-like or not.    -A forces
X    ECU    to treat the terminal as an ANSI terminal, regardless of the
X    contents of    the $TERM string.
X
X
X    3.2.13  -N
X
X    This switch    forces ECU to treat the    terminal as a non-ANSI terminal.  It
X    has    the opposite effect of -A.  You    must have a valid function key
X    recognition    entry for the $TERM type if this switch    is used.
X
X
X
X
X
X    Public Domain by wht@n4hgf                12/26/90
X
X
X
X
X
X
X
X    ECU    Technical Description                      25
X
X
X
X    3.3     Environment Variables
X
X
X    Prior to starting ECU, it is useful, but not necessary, to establish two
X    environment    variables, ECUPROMPT and ECUHELP.
X
X
X    3.3.1  ECUPROMPT
X
X    The    ECUPROMPT environment variable determines the prompt printed by    ECU
X    when the interactive command key ("HOME") is pressed.  When    you first
X    run    ECU, try setting it to your name, e. g.,
X
X     setenv    ECUPROMPT Ralph       if you use csh
X
X     ECUPROMPT=Ralph       if you use sh, ksh, etc.
X     export    ECUPROMPT
X
X    Then, when you see how it used, you    may wish to establish a    more
X    permanent choice in    your .login or .profile.
X
X
X    3.3.2  ECUHELP
X
X    Ordinarily,    ECU looks for interactive command help information in
X    "/usr/lib/ecu/ecuhelp.data".  The ECUHELP environment may be set to    the
X    complete pathname of the ecu help file if an alternate file    is to be
X    used.
X
X    The    help file is explained later in    the section titled "Online Command
X    Dictionary".
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X    Public Domain by wht@n4hgf                12/26/90
X
X
X
X
X
X
X
X    ECU    Technical Description                      26
X
X
X
X    4.    Interactive Mode Commands
X
X
X    The    following is a partial list of commands    available in the interactive
X    (non-procedure) mode.  It is not necessary to to enter the entire
X    command in most cases.  The    portion    of each    command    which must be
X    entered is capitalized in the following section headers.
X
X    Refer to the sections titled Interactive Command History and Line
X    Editing for    more information.
X
X
X    4.1     AX : ascii char to hex/oct/dec
X
X    usage: ax [<param>]
X
X
X    <param> may    be a single ASCII character, a standard    ASCII identifier
X    (such as ETX), or a    two-character control character    identifier (such as
X    ^C,    typed as a caret followed by a C).
X
X    If no argument is supplied,    a table    of control characters is printed
X    containing decimal,    octal, hex, ASCII identifiers and two-character
X    control character identifier.
X
X
X
X    4.2     BAud :    set/display line baud rate
X
X    usage: baud    [<baud-rate>]
X
X
X    <baud-rate>, if specified, must be taken from the values 110, 300, 600,
X    1200, 2400,    4800, 9600, 19200 and 38400.  On some systems, 19200 and
X    38400 may not be supported.     If baud rate 110 is selected, 2 stop bits
X    are    automatically specified; other baud rates set 1    stop bit.  If
X    <baud-rate>    is not supplied, the current baud rate is displayed.
X
X    The    setting    may be automatically changed as    the result of a    'dial'
X    command.  See also the dial    and parity command descriptions.
X
X
X
X    4.3     BN : all console event    alarm
X
X    usage: bn [    0 | 1 |    2 ]
X
X
X    "bell notify": If no argument is supplied, the current setting is
X    displayed.    Specifying 0 disables the facility; 1 causes an    audible
X    alarm to be    sounded    on all of the XENIX virtual consoles upon receipt of
X
X
X
X    Public Domain by wht@n4hgf                12/26/90
X
X
X
X
X
X
X
X    ECU    Technical Description                      27
X
X
X
X    a bell (0x07) character from the remote system; 2 causes an    audible
X    alarm to be    sent to    all consoles upon receipt of ANY characters from the
X    remote system.  A non-zero value also causes an audible alarm to be    sent
X    to all console upon    the successful completion of a 'redial'    command
X    which must retry more than one redial attempt or upon completion of    a
X    file transfer operation.
X
X    Different alarms are sent depending    upon the the type of event causing
X    the    alarms.
X
X    BN is set to 1 when    ECU begins executing.
X
X    The    setting    of this    command    has no effect if ECU is    not run    from a
X    multiscreen.
X
X
X    4.4     BReak : send break to remote
X
X    usage: break
X
X
X    This command sends a break signal to the remote system.
X
X
X
X    4.5     CD : change current directory
X
X    usage: cd [<dir-path>]
X
X
X    This command allows    you to change the working directory of the ECU
X    process.  If <dir-path> is supplied, the previous working directory    is
X    displayed, and <dir-path> is made the new working directory.  A history
X    of previous    directory changes is maintained.  Entering the cd command
X    shows the numbered history list and    allows you to select a new directory
X    by entering    the number.  Other commands allow deletion of directories
X    from the list or saving the    list to    file ~/.ecu/phone.  This file is
X    automatically read at ECU startup, providing a convenient list of
X    directories    available for quick selection.
X
X
X
X    4.6     DA : decimal to ascii char
X
X    usage: da [<decimal-val>]
X
X
X    <decimal-val> is a decimal value between 0 and 0377; the parity (sign)
X    bit    is stripped and    the equivalent ASCII character value is    displayed.
X
X    If no argument is supplied,    a table    of control characters is printed
X
X
X
X    Public Domain by wht@n4hgf                12/26/90
X
X
X
X
X
X
X
X    ECU    Technical Description                      28
X
X
X
X    containing decimal,    octal, hex, ASCII identifiers and two-character
X    control character identifier.
X
X
X
X    4.7     Dial :    dial remote destination
X
X    usage: dial    [<dial-param>]
X
X
X    <dial-param> may take one of two forms, a telephone    number to dial or a
X    logical name which can be found in the user    phone directory    (in file
X    ~/.ecu/phone).
X
X    If a telephone number is supplied, the phone number    is dialed; you must
X    first have set the desired baud rate and parity using the baud and
X    parity commands.
X
X    If a logical name is entered, the phone directory is searched; if the
X    entry is found, the    baud rate and parity is    automatically set.  If a
X    procedure file can be found    in the current directory or the    users home
X    .ECU subdirectory whose name matches the logical name, then    the
X    procedure is executed with the argument '!INTERACTIVE'.
X
X    If <dial-param> is not supplied, then a screen-oriented self-documenting
X    <:-)> directory manager is executed; you may scan the the directory    to
X    select a number to dial, as    well as    add, remove and    edit entries.
X
X    4.7.1  Alternate Dialing Directory
X
X    The    default    dialing    directory is ~/.ecu/phone.  You    may change to
X    another directory by issuing the interactive dial command with no
X    arguments to enter the dialing directory menu, selecting 'c'hange dial
X    directory, and entering the    name of    a new directory.  The specified
X    pathname must either be a fully qualified pathname or a pathname
X    relative to    the current working directory.    Once an    alternate directory
X    has    been selected, it will be used by both the interactive command 'dial
X    <logical>' and the dialing directory menu.
X
X    See    the section below titled "Choosing a Dialout Line" for more
X    information    on using "Any" in the "tty" field of a directory entry.
X
X
X    4.7.2  Multi-Number    Redial Cycle
X
X    While in the  dialing directory, you may "mark" one    or more    entries    for
X    a cyclical redial attempt.    When any entry is marked, typing ENTER
X    (carriage return or    line feed/newline) causes each marked entry to be
X    dialed in turn until one of    the remote systems is successfully
X    connected.    When a successful connection occurs, ECU unmarks the
X    associated entry, leaving the others marked.  Thus,    you may    mark several
X
X
X
X    Public Domain by wht@n4hgf                12/26/90
X
X
X
X
X
X
X
X    ECU    Technical Description                      29
X
X
X
X    entries and    merely reenter the dialing directory after each    connection
X    is finished    and press ENTER    to reenter the redial cycle.  If a single
X    entry is marked, ECU pauses    15 seconds between each    dialing    attempt,
X    otherwise 5    seconds.  Presing 'c' will cause the pause to be prematurely
X    terminated and the next attempt to be made.     Pressing your interrupt key
X    (DEL, ^C or    whatever) aborts the cycle.  If    you interrupt an active
X    dialing attempt, you will be prompted as to    whether    or not you wish    to
SHAR_EOF
true || echo 'restore of doc/ecu.man failed'
echo 'End of ecuman3 part 1'
echo 'File doc/ecu.man is continued in part 2'
echo 2 > _shar_seq_.tmp
exit 0
--------------------------------------------------------------------
Warren Tucker, TuckerWare emory!n4hgf!wht or [e-mail]
Hacker Extraordinaire  d' async PADs,  pods,  proteins and protocols

exit 0 # Just in case...
--
Kent Landfield                   INTERNET: [e-mail]
Sterling Software, IMD           UUCP:     uunet!sparky!kent
Phone:    [phone]         FAX:      [phone]
Please send comp.sources.misc-related mail to [e-mail].